Isolating digital audio reduces the system noise floor. With pulse-width distortion
as low as 300 ps and jitter as low as 50 ps, IsoLoop S-Series isolators are
the clear choise for high-fidelity I²S serial interfaces. With PWD as low
as 3 ns and up to five channels in 0.15" narrow-body SOICs, IL700/IL200-Series
isolators are ideal for high-fidelity parallel interfaces (see serial and parallel
illustrative circuits below):

Isolated Inter-IC Sound (I²S) Serial Interface Using IL710/IL711

Isolating a CD transport DAC with an isolated I²S bus eliminates ground loops.
The IL700-Series isolators' precision edge placement (only 50 ps typical
jitter) all but eliminates noise-induced phase error and hum in the analog side
of the audio system.

Isolated Parallel Audio DAC Using Two IL260s

Isolation ensures the best DAC performance by eliminating much of the digital
noise that tends to find its way onto the analog output. The unique five-channel
IL260 isolator series allows ten channels of isolation with just two narrow-body
or wide-body ICs.